Intraosseous lipoma: 48-year-old male with lucent lesion in the calcaneus on prior radiographs, status post aspiration. Suspected lipoma versus bone cyst. Lateral radiograph (a) of the ankle demonstrates radiolucent lesion at the anterior aspect of the calcaneus. Axial PD (b), PD FS (c) and axial T1 FS post-gadolinium (d) images. The lesion is predominately isointense to fat with loss of signal on fat saturated images. Foci of high signal within the lesion on the PD FS images represents cystic change. On post contrast imaging, mild enhancement of the cystic portions is observed.